Adjustable sucker rod wrench



Sept. 17, 1957 rl.. A. GILMAN ADJUSTABLE SUCKER ROD WRENCH Filed June 7, 1956 mum/ ,f A'LTRNEYS.

United States Patent O ADJUSTABLE SUCKER ROD WRENCH Lyle A. Gilman, Russell, Kans.

Application June 7, 1956, Serial No. 589,983

1 Claim. (Cl. 81-52.3)

This invention relates to an adjustable sucker rod wrench.

An object of this invention is to provide a wrench including a handle with a pair of jaws pivotally carried by the forward end of the handle, and one of the jaws including a hammer head engageable with an anvil formed on the forward portion of the handle so that the rod, nut or bolt may be easily started or nally tightened by a snap movement of the handle.

Another object of this invention is to provide a wrench embodying a pair of jaws with an improved means for adjusting and locking the jaws in adjusted position.

A further object of this invention is to provide a wrench which is of simple construction so that the parts thereof may be made sturdy and capable of extreme stress.

With the foregoing and other objects in view which will appear as the description proceeds, the invention consists of certain novel details of construction and combinations of parts, hereinafter more fully described and pointed out in the claims, it being understood that changes may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed.

Referring to the drawing:

Figure 1 is a detail side elevation partly broken away and in section of a wrench constructed according to an embodiment of this invention.

Fig. 2 is a sectional view taken on line 2-2 of Fig. l.

Fig. 3 is a detail side elevation partly broken away showing the side of the wrench opposite from that shown in Fig. 1.

Fig. 4 is a fragmentary longitudinal section similar to Fig. 2 on an enlarged scale, showing the adjustable jaw in released position.

Referring to the drawing, the numeral designates generally an elongated handle which is provided with a knob or enlargement 13 at the rear end thereof. The handle 10 is provided with an enlarged head 11 at its forward end which is bifurcated as indicated at 12 and 14. The head 11 is inclined downwardly and the side 12 of the bifurcated head 11 is provided with a downwardly curved upper edge 15. A wrench head generally indicated at 16 is pivotally secured between the arms or sides 12 and 14, being mounted on a pivot pin 17. The wrench head 16 includes a lower jaw 18 which is provided with an opening 19 extending therethrough and the jaw 18 also in cludes an upwardly projecting end portion 20. The inner v edge of the projection 20 is disposed in alignment with the inner edge of the opening 19 and the projection 20 with the jaw 18 is provided with teeth 21. An adjustable jaw 22 is disposed in confronting position to the jaw 18 and is provided with a shank 23 which engages through the opening 19. The shank 23 is provided on its outer or forward edge with teeth 24 which are complementary to and engage with teeth 21. When the teeth 21 and 24 are in interengagement the shank 23 is locked in adjusted position. The shank 23 is adapted to be tightly held in its adjusted and locked position by means of a Wedgeshaped locking member 25. The locking member 25 is fice provided with a cam-shaped inner edge 26 which engages an angled bottom edge 27 formed on the inner edge of the shank 23. The wedge 25 has a threaded shank 28 which engages through an opening 29 formed in the jaw member 18 and a nut 30 is threaded on the shank 28. The side 14 of the head 11 is provided with a relatively deep cut out '31 within which the nut 30 is adapted to loosely engage. The jaw member 18 also includes a hammer head 32 `at the inner end of the jaw 18 and the hammer head 32 is disposed in confronting position to an anvil 33 which is carried by the inner side of the head 11 at the rear of the opening formed by the spaced arms 12 and 14. The jaw member 18 at the lower end thereof is provided with a rearwardly projecting lug 34 which upon upward swinging of the jaw member 18, as viewed in Fig. 3, is adapted to engage a stop lug 35 projecting forwardly from the anvil 33. The lugs 34 and 35 limit the locking movement of the head 16 with respect to the handle 10.

In the use and operation of this wrench, `the jaw member 22 is adjusted relatively to the jaw member 18 by loosening the nut 30 on the shank 28. The wedge member 25 is then moved outwardly, or toward the handle of the wrench, so that the teeth 24 of shank 23 may be disengaged from the teeth 21. The shank 23 may then be be moved inwardly or outwardly as desired and when the space between the jaws 18 and 22 is correct for the particular element engaged between these jaws the wedge member 25 is moved inwardly, or toward the head of the wrench and the nut 30 is tightened onto shank 28. The nut, bolt or other element such as a sucker rod which is engaged by this wrench may be initially started in its unthreading operation by locking of the handle 10 with respect to the head 16. In this locking action the hammer 32 is adapted to strike the anvil 33 so as to give a snap action to the head 16 thereby facilitating the initial starting of the unthreading of the article. This snap action may also be produced at the final threading operation of the nut, bolt or other article so that the nut or bolt will be tightly secured.

What is claimed is:

A wrench comprising an elongated handle having a bifurcated forward end, a head pivotally secured between said bifurcations, said head comprising a pair of jaws, one of said jaws having an opening therethrough and an upwardly projecting end portion adjacent said opening, the other jaw including a shank movable .in said opening, one edge of said shank and the confronting wall of said opening and of said upwardly projecting end portion being formed with interengaging teeth, whereby said jaws may be clamped in adjusted position relative to each other, a wedge-shaped jaw locking member carried by said one jaw and extending transversely through a lateral slot in said one jaw into said opening engaging the opposite edge of said shank, said opposite edge being inclined oppositely to the incline of said wedge, to thereby lock said jaws in adjusted position, said interlocking teeth securing said jaws against movement of said shank in said opening, a threaded shank extending from the small end of the wedge-shaped jaw locking member through said one jaw, and a nut threaded on said latter named shank.

References Cited in the tile of this patent UNITED STATES PATENTS 567,715 Houghton Sept. 15, 1896 580,027 Wiltse Apr. 6, 1897 952,634 Post Mar. 22, 1910 2,558,374 Olsen et al. June 26., 1951 2,659,259 Jones Nov. 17, 1953 2,694,331 Meredith Nov. 16, 1954 

